In the past year I’ve been reminded twice of what the stakes actually are. Two men — both in their 40s, both married, both with young kids at home — died suddenly from heart attacks. No warning anyone saw coming. No obvious signs that the people who loved them were watching for. There one day, gone the next.

I was already on this journey when it happened. Already paying attention to my cardiovascular health, already taking it seriously. But those two men sharpened something that was already there. This isn’t an abstract risk. This is a man with a wife and children who does not come home one day. The families left behind are real. The preventability, in many cases, is real too.

Heart disease is the leading cause of death in men. It kills more men over 40 than anything else on the list. And unlike most causes of death, it is one of the most heavily influenced by the choices a man makes over decades — what he eats, how he trains, how he sleeps, how he manages stress, and which tools he uses to support his cardiovascular system deliberately.

This article is about the cardiovascular layer of the Tempered protocol: what to monitor, what to supplement, and why tadalafil — a compound most men think of narrowly as an ED medication — belongs in a serious cardiovascular stack.

The Problem with Cardiovascular Risk: It’s Silent Until It Isn’t

Most men don’t take cardiovascular health seriously until something forces them to. A bad lab result. A scare. Someone they know dying. The problem is that the cardiovascular system degrades quietly. High blood pressure produces no symptoms for years while doing cumulative damage to arteries, the heart, and the kidneys. Elevated lipids don’t announce themselves. Arterial stiffness builds gradually. The most dangerous version of cardiovascular disease is the version that feels like nothing until the moment it doesn’t.

This is why the Tempered approach to cardiovascular health is proactive rather than reactive. The goal is not to respond to a crisis. The goal is to monitor the right markers, support the cardiovascular system deliberately, and build a body where the internal environment is working in your favor — not compounding risk in the background while you look the other way.

The men who take cardiovascular health seriously before something goes wrong live longer, perform better, and are present for the people who depend on them.

Know Your Numbers: The Cardiovascular Baseline Every Man Needs

Most men don’t know their resting blood pressure. Many don’t know their lipid panel numbers beyond “total cholesterol.” Very few have ever had ApoB, Lp(a), or homocysteine tested. These aren’t obscure markers — they are the most predictive cardiovascular risk indicators available, and most standard panels don’t include them unless you ask.

The numbers every man over 40 should know:

Resting blood pressure: The most basic and most overlooked. Normal is below 120/80. Elevated is 120–129 systolic. Stage 1 hypertension begins at 130 systolic. Most men don’t own a cuff and couldn’t tell you their resting BP within 20 points. This is one of the highest-yield, lowest-cost health interventions available — a blood pressure cuff costs $30 and gives you immediate, actionable data.

Full lipid panel: Total cholesterol, LDL, HDL, and triglycerides are the baseline. But the more meaningful markers are ApoB — the most predictive marker of cardiovascular risk available, measuring the actual particle count driving arterial plaque — and Lp(a), which is genetically determined and important to know because it is not responsive to lifestyle changes in the same way LDL is.

Homocysteine: An amino acid that, when elevated, is an independent cardiovascular risk factor regardless of lipid levels. Elevated homocysteine responds well to B vitamin supplementation — B6, B12, and folate specifically. It is almost never tested in standard panels and almost always worth adding.

hsCRP (high-sensitivity C-reactive protein): A marker of systemic inflammation. Cardiovascular disease is fundamentally an inflammatory condition. Elevated hsCRP is an independent predictor of cardiac events and responds meaningfully to the lifestyle interventions that form the Tempered foundation.

Resting heart rate: A direct marker of cardiovascular fitness. Lower resting heart rate generally indicates better cardiac output and more efficient heart function. Most men know this number if they wear a fitness tracker — if not, 60 seconds with two fingers on the wrist gives you the baseline.

If you have had none of these tested, start there. The data informs everything else.

Blood Pressure: The Baseline You Cannot Skip

Blood pressure deserves its own section because it is the cardiovascular metric most directly relevant to Phase 3 protocols and the one most likely to be ignored until something forces attention.

The practical reality for men starting any Phase 3 protocol: establish a blood pressure baseline before you begin. Hormonal changes, new compounds, and protocol adjustments can all affect BP in ways that matter. If you don’t have a baseline, you don’t have a reference point. If you don’t monitor regularly, you won’t catch changes before they compound.

A home cuff is non-negotiable. They cost almost nothing and give you real-time data that a quarterly lab visit never will. Take readings at the same time of day, after several minutes of rest, and track the trend rather than reacting to any single reading. Morning readings before caffeine, seated and relaxed, give the most consistent baseline.

The monitoring frequency question has a practical answer: monitor more often when something is new or changing, less often when you’re stable and confident in your baseline. Early on, until you know your normal range and what elevated BP feels like in your own body, more frequent monitoring gives you the pattern recognition that protects you later. A man who knows his BP runs 118/76 at rest will notice immediately when it’s sitting at 138/90. A man who has never checked has no frame of reference at all.

Tadalafil: The Most Misunderstood Cardiovascular Tool

Most men know tadalafil as the active compound in Cialis — an ED medication. That framing is accurate but dramatically incomplete, in the same way that describing metformin as a blood sugar drug misses its broader metabolic applications.

Tadalafil works by inhibiting PDE5 (phosphodiesterase type 5), an enzyme that breaks down cyclic GMP — a signaling molecule that causes smooth muscle in blood vessel walls to relax. When smooth muscle relaxes, blood vessels dilate. When blood vessels dilate, blood flows more freely. The mechanism is systemic, not localized. Every system in the body that depends on vascular function benefits from improved vascular tone — and at 40+, vascular function is one of the most important health variables a man can actively support.

The cardiovascular applications with meaningful evidence:

Endothelial function: The endothelium is the thin layer of cells lining blood vessels. Endothelial dysfunction — reduced ability to vasodilate appropriately — is an early marker of cardiovascular disease and precedes clinical symptoms by years. Tadalafil improves endothelial function measurably.

Arterial stiffness: Arterial stiffness increases with age and is an independent predictor of cardiovascular events. PDE5 inhibition reduces arterial stiffness through the same smooth muscle relaxation mechanism.

Blood pressure: Daily low-dose tadalafil produces modest but consistent reductions in systolic and diastolic blood pressure through improved vascular tone.

Cardiac and pulmonary applications: Tadalafil is FDA-approved for pulmonary arterial hypertension — a fact that underscores how seriously the research community takes its cardiovascular mechanism. The cardiac protection data is real and extends beyond what the ED-medication framing suggests.

The erectile function benefit is a downstream consequence of vascular health, not a separate mechanism. A man whose vascular system is functioning optimally tends not to struggle with erections. This is not coincidence — erections are a vascular event. The same improved blood flow that protects arteries produces the erectile benefit. Framing it as “an ED medication I take for heart health” misses the point. The cardiovascular benefit is the primary mechanism. Everything else follows from it.

The Cardiovascular Supplement Stack

Tadalafil is the most pharmacologically active component of a serious cardiovascular protocol, but it works alongside a set of evidence-based supplements that target different aspects of cardiovascular health. The full stack:

EPA/DHA (Omega-3 fatty acids): The most evidence-backed cardiovascular supplement available. Triglyceride reduction, anti-inflammatory effects, improved endothelial function, and reduction in cardiovascular event risk in populations with elevated triglycerides. The evidence base here is deep and consistent. Daily dosing, every day.

Nattokinase: A fibrinolytic enzyme derived from fermented soybeans with meaningful data on blood flow improvement, platelet aggregation reduction, and potential cardiovascular protection. Works through a different mechanism than omega-3s — targeting the fibrin network involved in clot formation and arterial plaque progression. Daily.

Citrus Bergamot Extract: One of the most compelling natural lipid management compounds available. Consistent data showing meaningful reductions in LDL and triglycerides alongside improvements in HDL. For men whose lipid panels were elevated at baseline and who responded to citrus bergamot, the effects can be as significant as some pharmaceutical interventions. Daily.

Ubiquinol (CoQ10): The active, reduced form of CoQ10. The mitochondria in cardiac muscle cells have some of the highest energy demands in the body — CoQ10 is a required cofactor in the mitochondrial electron transport chain. Ubiquinol rather than ubiquinone because the conversion to the active form declines with age. Particularly relevant for men on statins, which deplete CoQ10. Daily.

Vitamin D3 + K2: D3 and K2 work synergistically for cardiovascular health — D3 supports calcium absorption and cardiovascular function broadly; K2 (specifically MK-7) directs calcium to bone rather than arterial walls, actively reducing arterial calcification. Most men are deficient in both. Weekly or daily depending on dose.

Magnesium Glycinate: Magnesium is involved in over 300 enzymatic reactions including blood pressure regulation, arterial smooth muscle function, and cardiac rhythm. Most men are deficient. Glycinate is the best-tolerated form and has the added benefit of sleep quality improvement through GABA pathway support. Nightly, 90 minutes before bed.

B Complex with Benfotiamine: The B vitamins — particularly B6, B12, and folate — are the primary nutritional intervention for elevated homocysteine, an independent cardiovascular risk factor. Benfotiamine (a fat-soluble form of B1) has additional benefits for advanced glycation end-product reduction and metabolic health. MWF dosing maintains levels without excess.

The Foundation Is Cardiovascular Medicine

No supplement stack substitutes for what the Tempered Foundation does for cardiovascular health directly. It’s worth stating explicitly because the supplement section can create the impression that the compounds are doing the heavy lifting. They are not.

Resistance training improves cardiac output, arterial compliance, and metabolic function in ways that no supplement replicates. Zone 2 cardio — sustained aerobic work at moderate intensity — is the most directly heart-health-relevant training modality available and improves mitochondrial density in cardiac tissue specifically. Sleep deprivation chronically elevates cortisol and inflammatory markers that drive cardiovascular risk. Chronic stress is a direct, independent cardiovascular risk factor with a well-established physiological mechanism.

The men who build the Foundation first and add cardiovascular supplements on top see their markers move in both directions simultaneously — lifestyle improving the baseline, compounds amplifying and maintaining what lifestyle has built. The men who add supplements without the Foundation are working upstream against a current they’re not addressing.

FROM THE FIELD

I was already taking cardiovascular health seriously before I lost two men I knew in the same year — both in their 40s, both with wives and young kids, both gone from heart attacks that came out of nowhere. I’m not going to overstate their role in my own protocol. The awareness was already there. But those two families made concrete something that’s easy to keep abstract: this is not a future risk. This is happening to men who look like they’re fine, right now, with people at home who depend on them. I don’t want to be that story for my family. That matters.

My cardiovascular supplement stack — EPA/DHA, Nattokinase, Citrus Bergamot, Ubiquinol, D3/K2, Magnesium Glycinate, B Complex with Benfotiamine, and Tadalafil 10mg daily — has been running consistently for long enough to see the results in the lab data. I started with lipid panels and glucose numbers that were elevated and moving in the wrong direction. Every advanced cardiovascular marker I monitor now — ApoB, Lp(a), homocysteine, hsCRP — has improved dramatically. Not slightly. Dramatically. The full protocol working together did that, not any single compound.

On tadalafil specifically: I take it daily. The cardiovascular case is the primary reason. What I can tell you from experience — no subjective feeling that I’d point to as clearly cardiovascular. What I do notice: the pumps in the gym are exceptional, and the improvement in blood flow shows up in ways that are hard to miss. Both of those are exactly what improved vascular function looks like from the inside.

On blood pressure monitoring: I use a home cuff and check weekly now. But when I started Phase 3 I had no idea what elevated BP felt like in my body. I had to learn the symptoms — for me it was a specific kind of head pressure, elevated HR, amped feeling, restless sleep and a change in how I felt overall. Until you know your own baseline and your own symptom pattern, monitor more frequently than you think you need to. Once you know what your normal looks like, you’ll catch anything meaningful early. That knowledge is worth the few minutes a week it takes to build it.

The Bottom Line

Heart disease is the leading cause of death in men over 40 and one of the most preventable with deliberate action taken early. The cardiovascular layer of the Tempered protocol — knowing your numbers, monitoring blood pressure consistently, running a serious supplement stack, and understanding what tadalafil actually does — is not optional for a man who takes his health seriously.

Most men ignore cardiovascular health until something forces their attention. The problem is that by the time something forces your attention, the damage has often been compounding for years. The Tempered approach is to monitor before there is a crisis, support the cardiovascular system before there is a deficit, and build a body where the internal environment is working in your favor — not against you.

→ Phase 3 overview: Article 16 — The Second Peak

→ Lab work at Phase 3: Article 22 — Lab Work at Phase 3: Monitoring a Protocol

→ The Foundation: Article 1 — Why Men Over 40 Feel Like Crap (And What to Actually Do About It)

→ Next: Article 24 — Beyond the Mirror: Athletic Identity After 40